package Com.webserver.core;

import Com.webserver.http.HttpRequest;
import jdk.internal.util.xml.impl.Input;

import java.io.*;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

/**
 * 处理与指定客户端的一次HTTP交互
 *
 * 完成一次交互由三步构成：
 * 1.解析请求
 * 2.处理请求
 * 3.响应客户端
 */
public class ClientHandler implements Runnable{
    private Socket socket;

    public ClientHandler(Socket socket){
        this.socket=socket;                          //客户端交互2
    }
    public void run() {                                                                //重写run方法1
        try {
                            //1.解析请求
            HttpRequest request=new HttpRequest(socket);

                            //2.处理请求
            String path=request.getUri();//
            File file=new File("./webapps"+path);
                            //3.发送响应
            /*
                HTTP/1.1 200 OK(CRLF)
                Content-Type: text/html(CRLF)
                Content-Length:2546(CRLF)(CRLF)
                10111010110101010101.........
             */
            OutputStream out=socket.getOutputStream();
                            //3.1发送状态行
            String line="HTTP/1.1 200 OK";
            byte[]data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);//回车符
            out.write(10);//换行符

                             //3.2发送响应头
            line="Content-Type: text/html";
            data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);//回车符
            out.write(10);//换行符

            line="Content-Length:"+file.length();
            data=line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);//回车符
            out.write(10);//换行符

            //单独发送CRLF表示响应头发送完毕
            out.write(13);
            out.write(10);

                             //3.3发送响应正文
            FileInputStream fis=new FileInputStream(file);
            data=new byte[1024*10];//10kb
            int len;//每次实际读取到的字节数量
            while ((len=fis.read(data))!=-1){
                out.write(data,0,len);
            }

            System.out.println("响应发送完毕！");

/*
         上述内容写好后，打开浏览器输入网址 http://localhost:8088/index.html
         测试读取浏览器发送过来的请求内容并在控制台上确认内容
 */

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //一次HTTP交互完毕后要与客户端断开连接（HTTP协议）
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }



}
